| 摘要 |
PROBLEM TO BE SOLVED: To reduce distortion (deformation of rubber protrusions) caused in the rubber protrusions, and to reduce the phenomenon of tooth skipping by forming the rubber protrusions formed on the inner peripheral surface into a plurality of rows, by changing the pitch of the rubber protrusions for each row and by forming the rubber protuberances in each row into a block by 1 or 2 pitches. SOLUTION: The coreless rubber crawler consists of a rubber protrusions 2a and 2b formed into a row in the longitudinal direction on the inner peripheral surface of an endless-form rubber elastic body 1, a lug which is formed on the outer peripheral surface, and in addition a steel cord row buried in the longitudinal direction. A plurality of rows of the rubber protrusions are formed, and the pitch of at least one row of the rubber protrusions is different from the pitches of the other rows of the rubber protrusions. Then, the coreless rubber crawler has a structure wherein the rubber protrusions of each row are formed into the block by one or two pitches. In Fig., the numeral 1 is the endless-form rubber elastic body, the marks 2a and 2b are the rubber protrusions, the marks 2ah and 2bh are the heights of the rubber protrusions, the mark 2A is the block of the rubber protrusions, the numeral 3 is the lug, and the marks Pa and Pb are the pitches of the rubber protrusions. COPYRIGHT: (C)2008,JPO&INPIT
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